Mario Manningham missed his third practice of the week, and Jim Harbaugh said the receiver, who has started nine games this season, is listed as doubtful on the 49ers' injury report.
That means rookie receiver A.J. Jenkins likely will see his first snaps of the season, Harbaugh said. "He's been on his assignments, he's executed well when he's been out there," Harbaugh said. "He's giving great effort. Football rewards that effort."
Until this week, Jenkins has spent spent practices as a member of the 49ers' scout or "look" team. That is, he's worn the jersey of of one of the upcoming opponent's wide receivers and practiced against the first-team defense. Jenkins said there was plenty to be gained from that situation.
"You're going against the No. 1 defense," he said. "And you can work on your own craft. Let's say the Lions have a route that's similar to ours. I can work on that route and do it against top-notch competition."
Jenkins, who is from Florida, also said it was nice that his first game will be against a team from the Sunshine State. He said his mom and dad would be in the stands.
The 49ers list 10 players as probable: K David Akers (pelvis), LB Navorro Bowman (shoulder), CB Tarell Brown (hamstring), CB Chris Culliver (illness), LB Tavares Gooden (knee, elbow), RB Frank Gore (wrist), G Mike Iupati (shoulder), CB Carlos Rogers (knee), LB Aldon Smith (shoulder) and LB Patrick Willis (shoulder)
For the Dolphins, safety Jimmy Wilson (hip) is questionable. TE Charles Clay (ribs), LB Karlos Dansby (biceps), TE Anthony Fasano (hip), P Brandon Fields (left knee, right knee), RB Jorvorskie Lane (knee), LB Koa Misi (finger) and LB Austin Spitler (ankle) are probable.
The NFL fined linebacker NaVorro Bowman for $10,000 for an unnecessary roughness penalty he incurred in the first-quarter of Sunday's game against the Rams. Safety Dashon Goldson was fined $7,875 for hitting Rams quarterback Sam Bradford as he slid in the fourth quarter. That 15-yard penalty eventually led to Greg Zuerlein's game-tying field goal in regulation.
Goldson's been penalized six times for a team-high 87 yards. All but one of his penalties have been personal-foul calls.
"The penalties he's gotten have been after the whistle," Harbaugh said. "So that's the main thing - pulling off the hit when the quarterback's sliding, leaving it when the whistle stops. But he's done a great job. There haven't been any helmet-to-helmet penalties from Dashon. His technique and ability really have been outstanding."
Harbaugh said that Michael Wilhoite, who was signed to the 53-man roster, would have gotten a game ball had the 49ers won on Sunday. "The tackles, and he did some great things in the punt (game), freed up some of our guys in the contain game, blocking his man and then getting chip on the next man," Harbaugh said. "He did a fantastic job. He was really on it assignment-wise the entire game."
Harbaugh on why the team has tended to bounce back -- in a big way -- in games after losses or ties.
"You're ticked off - that's probably the best way to describe it," he said. "Usually when you're ticked off, you're going to do one of two things. You're either going to do something about it or you go cower in the corner and shrivel up in the fetal position."
- Matt Barrows